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【单选题】
α-羟基酸受热发生脱水反应的主要产物是: A.交酯 B.α,β-不饱和羧酸 C.内酯 D.都不是A.
B.
C.
D.
D
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【简答题】1 用下列单词或词组的适当形式填空。(每空 10分, 5 分钟完成) obsession , emphasis, considerable, compliment , endure , perspective, 1. Lately, much __________ has been put on People’s life safety. 2. The cause of the viru...
【单选题】We didn’t expect the plan we had made very carefully for them ______ so coldly.
A.
refused
B.
to refuse
C.
to be refused
D.
refusing
【简答题】turn down (fold down; refuse to accept) turn in (go to bed; hand in) turn into (change to) turn out (extinguish; prove to be) turn: up, (arrive), 1. I don't see how a bright child can a dunce overnigh...
【简答题】Please fill the words according the following definitions. 3.to refuse to obey a law or rule, or refuse to do what someone in authority tells you to do.(vt. d_____) Synonyms: spurn at / sneeze at eg:W...
【单选题】We did not expect the plan we had made very carefully for them ______ so coldly.
A.
refused
B.
to refuse
C.
to be refused
D.
refusing
【单选题】We had to refuse the dinner invitation because of a _____ engagement.
A.
primary
B.
preceding
C.
prior
D.
prevalent
【简答题】选用方框内所给词的适当形式,完成短文。 minute sudden be refuse stop On Wednesday evening , we went to the Town Hall. It 1 the last day of the year and a large crowd of people ...
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